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| author | Moger, Babu <Babu.Moger@lsi.com> | 2011-04-08 11:38:33 -0600 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2011-05-01 10:46:57 -0500 |
| commit | 1c3afc423460035a6c2d0e4f01217e953bad3fd7 (patch) | |
| tree | 32580cf437d56d7d473ee1928766bd3bf517b07c | |
| parent | eebe9b96dda9018cc68a2855ca506ec26a1e449e (diff) | |
| download | op-kernel-dev-1c3afc423460035a6c2d0e4f01217e953bad3fd7.zip op-kernel-dev-1c3afc423460035a6c2d0e4f01217e953bad3fd7.tar.gz | |
[SCSI] scsi_dh_rdac : Detect the different RDAC operating modes
This patch detects different operating RDAC modes during the
discovery. It also collects the information about the preferred path.
Signed-off-by: Babu Moger <babu.moger@lsi.com>
Reviewed-by: Yanling Qi <yanling.qi@lsi.com>
Reviewed-by: Sudhir Dachepalli <Sudhir.Dachepalli@lis.com>
Reviewed-by: Somasundaram Krishnasamy <Somasundaram.Krishnasamy@lsi.com>
Reviewed-by: Bob Stankey <Robert.Stankey@lsi.com>
Reviewed-by: Vijay Chauhan <Vijay.Chauhan@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| -rw-r--r-- | drivers/scsi/device_handler/scsi_dh_rdac.c | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c index afb2fb1..4efe638 100644 --- a/drivers/scsi/device_handler/scsi_dh_rdac.c +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -194,7 +194,6 @@ struct rdac_dh_data { #define RDAC_LUN_UNOWNED 0 #define RDAC_LUN_OWNED 1 -#define RDAC_LUN_AVT 2 char lun_state; #define RDAC_PREFERRED 0 @@ -473,25 +472,33 @@ static int check_ownership(struct scsi_device *sdev, struct rdac_dh_data *h) int err; struct c9_inquiry *inqp; - h->lun_state = RDAC_LUN_UNOWNED; h->state = RDAC_STATE_ACTIVE; err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry), h); if (err == SCSI_DH_OK) { inqp = &h->inq.c9; - if ((inqp->avte_cvp >> 7) == 0x1) { - /* LUN in AVT mode */ - sdev_printk(KERN_NOTICE, sdev, - "%s: AVT mode detected\n", - RDAC_NAME); - h->lun_state = RDAC_LUN_AVT; - } else if ((inqp->avte_cvp & 0x1) != 0) { - /* LUN was owned by the controller */ + /* detect the operating mode */ + if ((inqp->avte_cvp >> 5) & 0x1) + h->mode = RDAC_MODE_IOSHIP; /* LUN in IOSHIP mode */ + else if (inqp->avte_cvp >> 7) + h->mode = RDAC_MODE_AVT; /* LUN in AVT mode */ + else + h->mode = RDAC_MODE; /* LUN in RDAC mode */ + + /* Update ownership */ + if (inqp->avte_cvp & 0x1) h->lun_state = RDAC_LUN_OWNED; + else { + h->lun_state = RDAC_LUN_UNOWNED; + if (h->mode == RDAC_MODE) + h->state = RDAC_STATE_PASSIVE; } - } - if (h->lun_state == RDAC_LUN_UNOWNED) - h->state = RDAC_STATE_PASSIVE; + /* Update path prio*/ + if (inqp->path_prio & 0x1) + h->preferred = RDAC_PREFERRED; + else + h->preferred = RDAC_NON_PREFERRED; + } return err; } |
